Stitcher mechanism for tire-making machines



R. A. HOLMES STITCHER MECHANISM FOR TIRE MAKING MACHINES Filed Sept. 22. 1920 2 sheets-Sheet 1 Aug.21,1923l v 1,465,552

R. A. HOLMES I v STITC'HER MECHANISM FOR TIRE MAKING MACHINES Filed Sept. 22 1920 2 Sheets-Sheet 2 a device in which tendency of the puckcr in the stitching: operation shall on Ill sorting to supplementary hund-stit Patented Aug. 23, lQZE.

do WRIGHT,

A COEPORATIOH OF IZICHIGAN.

STITCHER MECHANISM FOR TIRE-MAKING MACHINES.

Application filed September 22, 1920. Serial No. 412,001.

1 0 all whom it may concern:

Be it known that I, Renown A. HOLMES, a citizen of the United States, residing at Detroit, county of Wayne, and State of I'llichignn, have invented certain new and useful Improvements in Stitoher Mechw nisms for lire-Melting Mncnines, of which. the following is .1 full, clear, and exact description.

'lhis invention relates to stitchcr media-- nisins for lire-n1ulting machines and more particularly to a stitcher mechanism including oppositely disposed rotatable stitchers i -'ontuctin; with the entire fabric surfztce and laying fabric from the crown to the edge of the core and over the bend when the cesing is of the heed type, being :1 continue.- tion of my prior application Serial No. 136,618, filed December 13, 1916, to all matter common to the two appli ations.

()ne of the objects of th invention is to provide a simple and eliicient apparatus of the kind described, which, when employed in the manufacture of tires providedwitu ends, shell be adapted to accomplish the whole of the telling operation. withou 0' O l-inothcr object (it the invention is to obviated. Another object the invention is to provide a device which shall cause uniiorni adherence oi the fabric layers to one another in spite of various irregularities in the fabric due to joints between successive strips, etc. And further-object oi the invention is to provide the stitchers with sun porting, construction which permits reduction in their diameter and which ulso permits of their initial adjustment. for siinultaneous contacting; engagement with the fabric of the core as well as symmetrical. operation on opposite sides of the core :while the fabric is being laid.

In the accompanying drawings whereione of the various possible embodiments of the invention is shown;

Fig. 1 represents a. partial sectional plan view of apparatus showing the stitchers traversing a partially completed tire surface;

Fig. 2 indicates the position of the right hand stitcher on initial engegementwith the core;

Figs. 3, at and 5 are similar views of suc-= cessive stages of operation following that shown in Fig. 2;

1 g. 6 is a detailyiew of one of the stitchers and the mountings thereof;

Fig. 7 is a sectional detail view taken on the line 7-7, Fig. 6;

i l 8 is at side view of the stitcher shown in Fin. 6;

yielding or sectional plunger arms used in connection with the pneumatic mechanism for operating-the stitchers, and

11 is a vertical sectional detailshon ing" it stop pin and its controlling incohenisin.

lie ng new to the drawings, 1 indicates 1. rcciprocahle support or carriage mechanism including the embers and the operating means is mounted. The stiteher mecha- J i nisrn comprises a. pair of oppositely disposed stitcher-rollers 2 and 3, each of which with its applying mechanism. supports, etc, is

' ic-cl. and a. .d

scription of one Will serve it pair of of forming port of an angular fornicarrier 12, a bolt ll being provided. to draw the stud into the socket 11 and thereby hind rod against the flanking walls of the socket. The carrier 12 is fnlcrumed at 13V J o a lever 1 and a spring 13" ur es the 1. carrier about its fulcrum in such Wise as to more the stitchers toward each other :J and 10 are detail views of the stitchcr-niembcr comprises, as shown and against thecore. Preferably the stitch- I ers are arranged to exert aslight skiving action on the fabric as it is laid, and to this end the pin 8'0h which the'stitchers revolve, is adjusted out of parallelism with the axis of the stud 10 and inclined slightly to the plane determined by the axes of rod 9 and stud 10. Consequently when the stitchers iii) messes are revolved by traction against the core, they exert a sklving action which'is uniform and constant for any givenadjustment dun ing the laying on of 2 ply of fabricv The v lar to the axis'of the fulcrum 13. Maximum clearance for the stitchei'swhen theyenter the undercut portion of the carcass immediately adjacent the heads is provided by the oilset construction thus described above and relatively small stitchers may be used, thereby permitting wrinkles to be taken out of the fabric at and adjacent the beads where trouble has heretofore been encountered.

-Endwise adjustment of rod 9 permits the stitchers to he set to simultaneously contact with'the fabric on the core at the beginning of a laying on operation. The angular-formi-carrier 12 is provided with a projecting heel piece 12 and a rubber or other resilient cushion 15, positioned between it and a similar projecting piece on the lever 14:, is adapted to cushion the blow of the stitchers when their supporting and actuating mechanism is straightened out as shown in Fig. 1 preliminary to their initial contact with the core, as well as to permit the operator to momentarilyapply pressur to the stitchers when desired. i

To the other extremity of lever 14 is pivotally attached ascction 16 (see Figs. 9 and 10) of a plunger, the other section 17 of which is pivotally attached to a piston head 18 mounted to reciprocate in a charm ber'19. The section 17 of the plunger is provided with a socket into which a reduced portion of the section 16 fits and is connected thereto by means of a pin 20 operating in a slot 21. The two sections are yieldingrly hold apart by a coiled spring 22 surrounding them both and lying between the extremity of the lever 14 and the point of pi ol'al connection of the section 17 with the piston head The lever H is pivoted in the carriage at and swings therealmut in accordance with changes in ihe curvature of the core or pan tiully completed tire surface.

Lover 14 is moved about its fulcrum :23 by admitting air lnllil' pressure to the cylinder 19 an ile stitchers are thereby held elastically against the core. Springs 22 encircling theelescoping sections of the extensible link 17, cushion the blow when; the air is first admitted to the cylinder 19 and as these compressed springswork in the same direction as the air they have a sort of supplemental action which is especially ,-ulv:i;ii;ageoiis when the stitchcrs cross a of a laying on 9} of a plunger 32, Fig. 11, is shdably mounted spliced 'pmintjperinitting the stitchers to quickly and. immediately take care'of' the irrwg'ularity presented thereby.

1 minted on lever 1% and swinging there with is a chamber 25, to which, well as to'rohember 19, air is adapted to be supplied itlerough flexible conduits, 24-24". Mounted 'in chamber 25 is a piston head whose art *ulated to the lateral pins 28 of the c1111:v I'l L. member 12. According to this construction' at certain times each ,stitcher is adapted to swing upon its fulcrum connec- .tion 13 with the lever 11, this motion being.

under control of the air chamber 25 which acts against and overcomes the spring 13. Pro ecting from the wall of chamber 19.

and situated between chambers 25-25 is a single chamber 29 in which is a plunger 29' operable at certain timcsupon projecting arms 30 integral with levers 1 1. This chamber is supplied with air through a flexible conduit 31.

When the carriage is first moved forward the stitehers must not he too close to the central plane'otf the rotating core or else they will materially resist their'own further ad Vance. (in the other hand in stitching under the heads the stitchers must approach closer to thecentrel plane of the core than when they initially engage the core at the tread. To limit the turning movement of lever 14, about its fulcrum at the outset ration a stop in the form in the carriage 1 with its upper end normally pro ected a short distance above the top of the carriage 1 by a spring 33, which.

is connected to a hell-crank lever 34; ful crumed at 35 to the carriage and loosely pinned at 36 to the lower end of the plun- Q01 The opposite free end of the, lever 34 is provided with a roller 37 which is adapted to ride up the inclined surface 38 of the stationary base 39 on which car-- ria-gc 1 reciprocates.

limits outward movement oi the rear end oi lever 14 at the outset of a layini: o i ope oration. After the forward movement of the carriage 1 has carried the stitchers into engagement with the core or fabric being laid thereon, so that there is no further nossi- The sto i or plunger v plunger 25 is loosely pinned. as indicated at. 2% to a link 2'? whose forked end is loosely bility of the forward end of the iever rnov 4 ing too close together, the stop or plunger is withdrawn and held in the sol i line position shown in Fig. 11 by the c action of the surface 38 on the heli cranli' lever 3 And therefore when the stitcl'iers arrive at the head portion of the casing or car .853 the levers 14. are free to more inward the re quired distance to smooth the fabric on the under or lower surface of the as illustrated in 5.

The carriage 1 and parts menth are adapted to away from s ro- .lL /hB the stitchers 2 and 3. I 'lhtZlS may he em- 5 ploycd 'ehng esrrisgge l,

well known to sLniisr to thst Itiursel. 1,279,337, spcciiic ineclisnism "s not forming a. .1 invention rcquircs no the core incinrelatively :lth the sitchcrs n, then y spreud brought I ths pisliuring the adsLd the core, air to cylinders 25 s mscl'isnism supporh to assume s r shown in i is new l-iare as 1, limits their v in Fig. Q and e of the core, forward movethe carriage conlhc stretching unto the core or uring this opinst the the club pressure of com- :ylind "s scting on the pissut the time the st chcrs reach the widest part the core in thcir forward movement sud with the parts in nearly tho same position as illustrated in 1. air pressure in the cylinder is relieved. his does not noticeably alter the position of the parts, which rema n unchanged and stretched out or distcndei'l cxccptin" us they swing: about pivot to conform to the outline of the core. it the casing: being made has no beads thc curring continues its movement, the stitchers moving inward until the :uch the casin r when the movement of the carriage is halted and simultaneously air is shut off "from the cylinder 19. The stitcher parts are then free to rotate about the fulcrum 13 under the action of thc 2 ring 13' coiled fabric. is laid completely on each side of the with lever 14 the st-itehers ore separated and thrown clear of the core. In the. movement or the stitcher carriers 12 about the fulcrums 13 under the action of springs 13' to the doubled up condition illustrated in Fig. 4 latches 41 engage under pins 26 and hold the linkage doubled.

If the casing being made is of the bend type the operation is the same until the stitches encounter the bead, vvhich of course, is utter the pressure on cylinder 25 is relicved. On reaching the bead the stitchers free to turn from their stretching out position illustrated in Figs. 1 snd 2 to the doubled up position illustrated in Fig. i and in this movement they are assisted by the spring 13 coiled about the fulcrum 13. And as will be obvious from what has been said before when the stitching linkages are in c douhl under pins 26 and hold the linkage doubled;

ed up condition latches 41 engage The carriage, of course, travels further in 0 stitching over beaded than straight-sided casings. In either of the two cases mentioned, at the end of a stitching operation =1 ith the stitchers in n doubled up position and held clear of the core, by reason-of the spreading notion of the' plunger 29 on the l ta 1 The .succossive'stsgcs of operation are illustrated in Figs. 2, 1, 3, 4, and 5 in the order enumerated when s. beaded casing is being formed.

it is td-be fabric around the sides of the core that the stitchcrs fulcrum about their pivots 13, but when the head is reached their peripheral grooves 7 embrace it and thereafter the st'itchers swing about-grooves 7 as a center. The curve of the groove 7 conforms substantislly to the curve of the bead. In laying the "fabric on the'bottom side of the heads the stitchers assume the position illustrated in'Fig. 5.

The stitcher mechanism described is sim-' ple and efiicient and by virtue of the shape of the stitcher members and their conformity to the fabric placed over the head the whole of the stitching operation may he accomplished without resorting to supplementaryand the sectional plungers provides a moreuniform adherence of the fabric layers to one another in spite of irregularities in the fabric which may occur due J30 joints benoticed thst'in applying the ml arms 300i the lovers 1%, the earrings retracted to a position which allows the I core, to be removed and another substituted. l I

h ;:11dence i piacaci Mom upon rataie the siitche'rs abouf,

Ike rubbsrcnshion 123 retcniis a v Em: and a device for zween s'mcessivs em, 25

at ve mavemei =3 betweca ine :mGihe meumatic aciv 611g any across the core g ght fabric at the tread Tc. 1% y 2b.; S$ii3Ch-1 2 a; for ayizzg fabric 01a made in (me piacfi H an, a pair of rollers er ink.f1-6----1Z could u znsn fiiigijf'i, me of the their use mvizap; gmuved periphexf/ the Work.

2: in Le shapa of fabric and 1 1 "vii bu- 339M a "he 02E mile-r 25130 Contact 011% a d. 01. 311C pm 151 having a roimded YLFUZEYI"ET 12, bar fabric intu the lrculm' and limes of 2.11m and d 2- usting $10 5 ml 10 1mm contact with 26 a 111 over t. 12 bead.

03 pet v a for fabric. on a, 911M115!) .3011, a mtzatabie :5 {W513 22p he 00% at dime 1y 0p; on v a. 51mm in? nmving Swfiid exact her-imam; I k 5. *own 0f fabric up pliad 25 if esiz'ed, v thereaf while 99 Ami as many (whe -5; 021' ii contam; with iii v saidpmembe 1 ie with -ztialiy perpexadicu Fae Ito 92 12 adjacunt 1e stitching paint 36 int 4 y in 01in raiatifin {a the 95 tL-e of the care and i4. ataabie'fabric shm v 0n as p 55mg fabric 011 wtzltable 1% 0? movcare and s exfirt a subactian on the 1 aperation.

wid'sd Wiih 121 mg; fabnc ,on 52nd fianw a pan 0:? ro'wdtable arms 01 suppsrting or waving said arms y of me cnm,a11d arms fur mijusing said speaat to the plane of cam orm 1 moving 5a 5 45 surmm 0i sentamb Wi lh i.

- we adjacent and 56 0: heir respective" haying fabric on pan" 0f rots-$25k:

pn'otaily hem arms w'i Y A devlce to? mnv- 12a fabri m-- said r5155 transversely $01-11 0n sax} arms s saiiquel y reovement tramsmesses mechanism controlling the action of said lever members and springs cooperating with. said lever membersto more said rolls.

11. In a mechanism for laying fabric on a core, in combination, oppositely disposed fabric applying rotatable rolls. arms for supporting said rolls. lever members for moving said arms toward and away from one another and the core, pneumatically operated plunger-s connected with said levers, each of said plungers having a stem comprising relatively moving sections and a spring controlling the movement of said sections.

12. In a mechanism for laying fabric on a core. in combination, a pair of oppositely disposed fabric applyingrotatable rolls. pneumatic means for urging said rotatable members toward and from said core and a rubber cushion for pcrmittinp slight relative movement between said rolls and said pneumatic means along the path of motion provided by said pneumatic means.

13. T11 a machine for laying fabric on a core, in combination. opposed rotatable stitchers. a lever fixedly supporting each stitcber. means for operating said lever including an actuating fulcrum and an actuating pivot spaced from the fulcrum. and an adjustable connection between each stitcher and its lever located at one side of a line through an axis of itst'ulcrum and pivot.

14. In a machine for laying fabric on a core. in combination. opposed stit 'hers. means for rotatablv supportingeach of said stitchers inchidinp a lengthwise adjustable postv in substantial parallelism and con-i tiguous the plane of the stitchers effective periphery, and articulated mechanism for actuating the posts to move the stitchers transversely of the core.

15, In a machine for laying fabric on a core, in combination, opposed stitchers. means for rotatably supporting each of said stitchers including an axially arranged pin. an angularly adjustable post supporting the pin and arrangecbat substantially right angles thereto and in substantial parallelism and contiguous the plane of the stitchcrs efiective periphery. and mechanism connected to each post at one side of the axis of rotation of each stitcher for operation thereof. it

16. In a machine for laying fabric on a core, in combination opposed stitchers rooved to conform fabric to the bead.

means for rotatably supportingizeach of said stitchers including a post in substantial parallelism and contiguous the plane'of the stitchers effective periphery. and articulated mechanism for actuating the posts to more the stitchers transversely of the core. 17. In a machine for laying fabric on a core, in combination, opposed stitchers grooved to conform fabric to the bead. means for rotatably supporting each of said stitcheis including an axially arranged pin. a post supporting the pin and arranged at substantially right angles thereto and in substantial parallelism and continuous the plane of the stitchers effective periphery. and a mechanism connected to each post at. one side of the axis of rotation of each stitcher for operation thereof.

Signed at- Detroit. l\lichigan. teenth day of September. 1920.

RUDOLPH A. HOLMES.

this six- 

